CN115591152B - Remote gas fire-extinguishing explosion-suppressing system applied to open space and application method thereof - Google Patents
Remote gas fire-extinguishing explosion-suppressing system applied to open space and application method thereof Download PDFInfo
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- CN115591152B CN115591152B CN202211100760.0A CN202211100760A CN115591152B CN 115591152 B CN115591152 B CN 115591152B CN 202211100760 A CN202211100760 A CN 202211100760A CN 115591152 B CN115591152 B CN 115591152B
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000011261 inert gas Substances 0.000 claims abstract description 181
- 239000007789 gas Substances 0.000 claims abstract description 91
- 238000002347 injection Methods 0.000 claims abstract description 50
- 239000007924 injection Substances 0.000 claims abstract description 50
- 238000004880 explosion Methods 0.000 claims abstract description 41
- 230000001629 suppression Effects 0.000 claims abstract description 40
- 239000000446 fuel Substances 0.000 claims abstract description 33
- 238000003860 storage Methods 0.000 claims abstract description 24
- 238000012360 testing method Methods 0.000 claims abstract description 22
- 238000005507 spraying Methods 0.000 claims abstract description 21
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000001301 oxygen Substances 0.000 claims abstract description 12
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 7
- 239000002360 explosive Substances 0.000 claims abstract description 5
- 238000002474 experimental method Methods 0.000 claims description 17
- 239000003638 chemical reducing agent Substances 0.000 claims description 13
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 238000003491 array Methods 0.000 claims description 11
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 5
- 239000001569 carbon dioxide Substances 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 125000000217 alkyl group Chemical group 0.000 claims 1
- 239000007921 spray Substances 0.000 abstract description 4
- 238000009827 uniform distribution Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 150000001335 aliphatic alkanes Chemical class 0.000 description 3
- 206010000369 Accident Diseases 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000009982 effect on human Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- UKACHOXRXFQJFN-UHFFFAOYSA-N heptafluoropropane Chemical compound FC(F)C(F)(F)C(F)(F)F UKACHOXRXFQJFN-UHFFFAOYSA-N 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000957 no side effect Toxicity 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/002—Fire prevention, containment or extinguishing specially adapted for particular objects or places for warehouses, storage areas or other installations for storing goods
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/28—Accessories for delivery devices, e.g. supports
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/50—Testing or indicating devices for determining the state of readiness of the equipment
Landscapes
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Operations Research (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The invention belongs to the technical field of fire control and explosion suppression, and discloses a remote gas fire-extinguishing and explosion-suppression system applied to an open space and a use method thereof. The remote gas fire-extinguishing explosion-suppressing system comprises a gas storage system, a gas conveying system, a gas spraying system and a starting control system. The using method of the remote gas fire-extinguishing explosion-suppressing system is that a large amount of inert gas is injected into a potential fire area and a fuel leakage area through a nitrogen injection array with a specific structure, so that the oxygen volume concentration in the fire area or the fuel leakage area is reduced, the oxygen concentration is reduced to the ignition lower limit of the fuel, and finally the fire is extinguished or the leaked fuel cannot be ignited. The remote gas fire-extinguishing explosion-suppression system has the advantages of large spraying range, uniform distribution of fire-extinguishing inert gas, capability of randomly changing the spraying angle of the inert gas spray head, capability of randomly adjusting the position and the height of the inert gas spray array and the like, and can be expanded to be arranged and used in test plants and warehouses related to inflammable and explosive mediums.
Description
Technical Field
The invention belongs to the technical field of fire-fighting explosion suppression, and particularly relates to a remote gas fire-fighting explosion suppression system applied to an open space and a use method thereof.
Background
The ground test of the aviation power plant relates to the use of a large amount of flammable and explosive fuels under the high-temperature and high-pressure state, so that fire and explosion accidents possibly occurring in the test process are effectively prevented, and the ground test of the aviation power plant has important significance for guaranteeing the safe and smooth development of the ground test of the novel aviation power plant.
The fuel used in the ground test of the aviation power plant is mostly flammable and explosive liquid (gas) and has stronger volatility. Aiming at the fire-extinguishing and explosion-suppressing requirements of the fuel, the conventional fire-fighting devices such as fire hydrants, fire-fighting water belts, hand-held fire extinguishers and other conventional fire-fighting products have risks in actual use, and mainly comprise: (1) Although the fire-fighting products in the traditional sense can accomplish the suppression of small-sized fires, the fire-fighting products have relatively insufficient capability of controlling fuel leakage and explosion; (2) All the above-mentioned equipment requires personnel to operate, and requires a certain time from the beginning of response to the complete deployment, during which the accident may further deteriorate; (3) When the equipment is used and unfolded, test personnel are required to enter a test site under the condition that open fire is not completely extinguished or fuel explosion risks exist, the exposure risk is increased, and once secondary disasters occur, the life safety of the test personnel is directly threatened. Therefore, the remote fire extinguishing and explosion suppression technology is developed, on one hand, the response speed of emergency treatment of fuel leakage, fire and explosion accidents can be greatly improved, on the other hand, test personnel and the accident scene can be comprehensively isolated, and the remote starting and the rapid rescue can be realized on the premise of ensuring the safety of the test personnel.
The medium used by the common remote fire-extinguishing and explosion-suppressing device comprises inert gas (nitrogen, carbon dioxide, heptafluoropropane), fire-fighting dry powder (ABC dry powder, aerosol and the like) and fine water mist (pure water and water mixed with additives), and the gas can effectively weaken and suppress fuel fires and explosions and can be well applied to a limited space. However, the scene of fire at the ground test site of an aero-power plant has a certain specificity: firstly, a test piece of the aviation power plant contains more precise components, and when fire disaster is suppressed and explosion is suppressed, a fire extinguishing and explosion suppressing medium is a cleaning medium and cannot pollute and influence the test piece; secondly, when spraying to extinguish fire, the fire-extinguishing explosion-suppressing medium needs to cover the whole fire or the fire area; thirdly, as operators enter and exit in the test site, the fire-extinguishing explosion-suppressing medium should be nontoxic and have no side effect on human bodies. Therefore, the inert gas is adopted as the fire-extinguishing explosion-suppressing medium, and the requirements can be met.
However, because the differences of the fire-related explosion scenes, the types of the used fuels and the specific operating conditions of the ground tests of different aviation power devices are developed, the attenuation and inhibition details of the inert gas to the fire explosion of the fuels under different scenes and the internal control mechanism are also different, the universality of the conventional single-point injection or multi-point injection inert gas fire extinguishing device applied to the ground test sites of the aviation power devices is still insufficient, and the design of a remote fire extinguishing and explosion suppression system is required to be completed aiming at the special environment of the open space of the test sites.
Currently, there is a need to develop a remote gas fire suppression explosion suppression system for open spaces. The open space is a space without a constraint wall surface on the periphery relative to the limitation. The remote gas fire-extinguishing explosion-suppressing system takes inert gas as fire-extinguishing explosion-suppressing medium, and can treat fire accidents and combustible gas leakage accidents in the open space. When a fire accident occurs on site, an operator can open a pneumatic valve of the inert gas pipeline by using a remote start cabinet in an operation room, so that a large flow of inert gas is sprayed in an accident area, and fire extinguishing is performed by reducing the oxygen concentration content near the fire area. In addition, the system can also jet inert gas near the leakage source in a remote starting mode after the combustible gas leaks but is not ignited, so that a uniform inert gas cladding area is formed, the oxygen concentration of the leakage area is reduced, the diffusion speed of the combustible gas is increased, and the possibility of igniting the combustible gas is reduced.
Disclosure of Invention
The invention aims to provide a fire extinguishing and explosion suppression method for the remote gas fire extinguishing and explosion suppression system in an open space, and aims to provide an inerting and explosion suppression method for the remote gas fire extinguishing and explosion suppression system in an open space.
The invention relates to a remote gas fire-extinguishing explosion-suppressing system applied to an open space, which is characterized by comprising a gas storage system, a gas conveying system, a gas spraying system and a starting control system;
the gas storage system comprises a high-pressure inert gas storage tank, and a pressure gauge, a safety valve and an emptying valve are arranged on the high-pressure inert gas storage tank;
the gas conveying system comprises a quick valve I, a gas venturi, a pressure reducer, a quick valve II and a high-pressure pipeline;
the gas injection system comprises an inert gas injection array, an inert gas injection array bracket, an inert gas nozzle, a flange and a nozzle adapter;
the starting control system comprises a control cabinet and an electric wire;
the high-pressure inert gas storage tank is sequentially connected with the quick valve II, the pressure reducer, the gas venturi and the quick valve I through a high-pressure pipeline, and is divided into 2 paths through a tee joint, each path is connected with 1 vertical inert gas injection array through a flange, and the inert gas injection arrays are fixed on an inert gas injection array bracket; the 2 inert gas injection arrays are positioned on two sides of the experiment platform, the length of the experiment platform is L, the height of the experiment platform is H, the length of the inert gas injection arrays is L, the height of the vertical symmetrical center line is H, and the horizontal distance between the inert gas injection arrays and the experiment platform is H;
the inert gas jet array consists of inert gas nozzles arranged in a grid mode, and each inert gas nozzle is arranged on the intersection point of high-pressure pipelines distributed in the grid mode through a nozzle adapter; the nozzle adapter is provided with a preset included angle and is used for changing the injection angle of the inert gas nozzle;
the quick valve I and the quick valve II are connected to a control cabinet through wires, and the control cabinet controls the opening and closing of the quick valve I and the quick valve II.
Further, the inert gas is nitrogen, carbon dioxide or halogenated alkane fire extinguishing agent.
Further, the pressure range of the high-pressure pipeline is 3MPa to 7MPa.
Further, the high-pressure pipeline is made of 20# steel.
Further, the inert gas nozzle is of a bottle structure; the bottle mouth of the bottle body is provided with an interface flange which is fixedly connected with a corresponding interface flange on the nozzle adapter; two circles of side holes are formed in the position, close to the bottle bottom, of the bottle body, the number of each circle of side holes is 4, the two circles of side holes are uniformly distributed along the circumferential direction of the bottle body, and the two circles of side holes are distributed in a staggered mode; the inner diameter of the side hole is d, the center of the bottle bottom is provided with a bottom hole, and the inner diameter of the bottom hole is 4d; the total injection area of the single inert gas nozzle is 6pi.d 2 。
Further, the calculation formula of the total flow of inert gas of the remote gas fire-extinguishing explosion suppression system is as follows:
wherein C is d And C * Is an outflow coefficient and a critical flow function of the gas venturi; a is that th A flow area at the minimum diameter of the gas venturi; p (P) t And T t The total pressure and the temperature of the inflow gas are respectively; r and M are respectively a gas constant and a gas molar mass;
the calculation formula of the jet gas flow rate of the single inert gas nozzle is as follows:
wherein:
-inert gas flow, kg/s;
A a -the flow area of a single inert gas nozzle;
p-inert gas inlet pressure;
gamma-inert gas specific heat ratio;
M-Mach number, 1;
r-inert gas constant;
t, inert gas temperature, 300K;
n-number of individual inert gas nozzles; take n=1.
The invention discloses a fire extinguishing method applied to a remote gas fire extinguishing explosion suppression system in an open space, which comprises the following steps:
when the fuel fire disaster of the experimental platform is found, the quick valve I and the quick valve II are started through the control cabinet, high-pressure inert gas of the high-pressure inert gas storage tank flows along the high-pressure pipeline, the pressure is regulated to a preset pressure through the pressure reducer, the expected flow is regulated through the gas venturi, the inert gas enters the inert gas injection array through the high-pressure pipeline distributed through the grids and is sprayed out through the inert gas nozzles, the inert gas forms an inert gas coverage area near the experimental platform, the oxygen concentration of the ignition area is diluted, and finally the fire disaster is extinguished.
The invention discloses an inerting explosion suppression method applied to a remote gas fire extinguishing explosion suppression system in an open space, which comprises the following steps of:
when the experimental platform is found to leak fuel, the quick valve I and the quick valve II are started through the control cabinet, high-pressure inert gas of the high-pressure inert gas storage tank flows along the high-pressure pipeline, the pressure is regulated to a preset pressure through the pressure reducer, the pressure is regulated to an expected flow through the gas venturi, the inert gas enters the inert gas injection array through the high-pressure pipeline distributed in a grid mode and is sprayed out through the inert gas nozzles, the inert gas is continuously sprayed and an inert gas coverage area is formed near the experimental platform, the oxygen concentration of the fuel leakage area is diluted, and the leaked fuel cannot be ignited.
The remote gas fire-extinguishing explosion-suppressing system applied to the open space is mainly used for the open space, takes inert gas (nitrogen, carbon dioxide or halogenated alkane fire-extinguishing agent) as a fire-extinguishing explosion-suppressing medium, and takes an inert gas nozzle with a plurality of different-diameter spray holes as a fire-extinguishing medium spraying device.
The remote gas fire-extinguishing explosion-suppressing system applied to the open space can remotely control the quick valve to start under the condition that personnel do not enter the site, so that high-pressure inert gas enters the inert gas injection array through the gas conveying system and is sprayed out through the inert gas nozzles, a large-range inert gas coverage area is formed in a fire or fuel leakage area, the oxygen volume concentration in the fire or fuel leakage area is further reduced, the oxygen concentration is reduced to the ignition lower limit of fuel, and finally, the fire is extinguished or the leaked fuel cannot be ignited and detonated.
The remote gas fire-extinguishing explosion-suppressing system applied to the open space can fully isolate test personnel from an accident site, and ensures the safety of the test personnel while completing the site fuel leakage, fire and explosion accident treatment.
The remote gas fire-extinguishing explosion-suppressing system applied to the open space can flexibly adjust the flow according to the fire intensity and the fuel leakage amount, can extinguish various fires and can suppress explosion after fuel leakage; simple structure, the part is changed conveniently, uses the operation, adjusts conveniently, and stability is high, and the reliability is strong, can extend to the experimental factory building and the warehouse that relate to inflammable and explosive medium and arrange and use.
Drawings
FIG. 1a is a schematic diagram (overall view) of a remote gas fire suppression and explosion suppression system for open spaces according to the present invention;
FIG. 1b is a schematic diagram (partial enlarged view) of a remote gas fire suppression and explosion suppression system for open spaces according to the present invention;
FIG. 1c is a schematic diagram (component diagram) of a remote gas fire suppression and explosion suppression system for open spaces according to the present invention;
FIG. 2a is a schematic view (front view) of the inert gas nozzle of the remote gas fire suppression and explosion suppression system for open spaces according to the present invention;
FIG. 2b is a schematic view (A-A 1 cross-sectional view) of the inert gas nozzle of the remote gas fire suppression and explosion suppression system for open spaces according to the present invention;
FIG. 2c is a schematic view (B-B1 cross-sectional view) of the inert gas nozzle of the remote gas fire suppression and explosion suppression system for open spaces according to the present invention;
FIG. 2d is a schematic view (bottom cross-sectional view) of the inert gas nozzle of the remote gas fire suppression system of the present invention applied to an open space;
FIG. 3 is a schematic view (front view) of the inert gas jetting array of embodiment 1;
FIG. 4 is a schematic view (45) of the connection of the inert gas nozzle and the nozzle adapter of example 1.
In the figure, 1. An experiment platform; 2. an inert gas jet array; 3. an inert gas jet array support; 4. an inert gas nozzle; 5. a flange; 6. a quick valve I; 7. a gas venturi; 8. a pressure reducer; 9. a quick valve II; 10. a high pressure inert gas storage tank; 11. a control cabinet; 12. a nozzle adapter.
Detailed Description
The invention is described in detail below with reference to the drawings and examples.
The invention relates to a remote gas fire-extinguishing explosion-suppressing system applied to an open space, which is characterized by comprising a gas storage system, a gas conveying system, a gas spraying system and a starting control system;
the gas storage system comprises a high-pressure inert gas storage tank 10, wherein a pressure gauge, a safety valve and an emptying valve are arranged on the high-pressure inert gas storage tank 10;
the gas delivery system comprises a quick valve I6, a gas venturi 7, a pressure reducer 8, a quick valve II 9 and a high-pressure pipeline;
the gas injection system comprises an inert gas injection array 2, an inert gas injection array bracket 3, inert gas nozzles 4, a flange 5 and a nozzle adapter 12;
the starting control system comprises a control cabinet 11 and an electric wire;
as shown in fig. 1a to 1c, a high-pressure inert gas storage tank 10 is sequentially connected with a quick valve ii 9, a pressure reducer 8, a gas venturi 7 and a quick valve i 6 through a high-pressure pipeline, and is further divided into 2 paths through a tee joint, each path is connected with 1 vertical inert gas spraying array 2 through a flange 5, and the inert gas spraying array 2 is fixed on an inert gas spraying array bracket 3; the 2 inert gas injection arrays 2 are positioned on two sides of the experiment platform 1, the length of the experiment platform 1 is L, the height of the experiment platform is H, the length of the inert gas injection arrays 2 is L, the height of the vertical symmetrical center line is H, and the horizontal distance between the inert gas injection arrays 2 and the experiment platform 1 is H;
the inert gas injection array 2 consists of inert gas nozzles 4 arranged in a grid manner, and each inert gas nozzle 4 is arranged on the intersection point of high-pressure pipelines distributed in the grid manner through a nozzle adapter 12; the nozzle adapter 12 has a preset included angle for changing the injection angle of the inert gas nozzle 4;
the quick valve I6 and the quick valve II 9 are connected to the control cabinet 11 through wires, and the control cabinet 11 controls the opening and closing of the quick valve I6 and the quick valve II 9.
Further, the inert gas is nitrogen, carbon dioxide or halogenated alkane fire extinguishing agent.
Further, the pressure range of the high-pressure pipeline is 3MPa to 7MPa.
Further, the high-pressure pipeline is made of 20# steel.
Further, the inert gas nozzle 4 is shown in fig. 2a to 2d and is in a bottle structure; the bottle mouth of the bottle body is provided with an interface flange which is fixedly connected with a corresponding interface flange on the nozzle adapter 12; two circles of side holes are formed in the position, close to the bottle bottom, of the bottle body, the number of each circle of side holes is 4, the two circles of side holes are uniformly distributed along the circumferential direction of the bottle body, and the two circles of side holes are distributed in a staggered mode; side surfaceThe inner diameter of the hole is d, the center of the bottle bottom is provided with a bottom hole, and the inner diameter of the bottom hole is 4d; the total injection area of the single inert gas nozzle 4 is 6pi.d 2 。
Further, the calculation formula of the total flow of inert gas of the remote gas fire-extinguishing explosion suppression system is as follows:
wherein C is d And C * Is a function of the outflow coefficient and critical flow of the gas venturi 7; a is that th Is the flow area at the minimum diameter of the gas venturi 7; p (P) t And T t The total pressure and the temperature of the inflow gas are respectively; r and M are respectively a gas constant and a gas molar mass;
the calculation formula of the jet gas flow rate of the single inert gas nozzle 4 is as follows:
wherein:
-inert gas flow, kg/s;
A a flow area of a single inert gas nozzle 4;
p-inert gas inlet pressure;
gamma-inert gas specific heat ratio;
M-Mach number, 1;
r-inert gas constant;
t, inert gas temperature, 300K;
n—number of single inert gas nozzles 4; take n=1.
The invention discloses a fire extinguishing method applied to a remote gas fire extinguishing explosion suppression system in an open space, which comprises the following steps:
when the fuel fire disaster of the experiment platform 1 is found, the quick valve I6 and the quick valve II 9 are started through the control cabinet 11, the high-pressure inert gas of the high-pressure inert gas storage tank 10 flows along the high-pressure pipeline, the pressure is regulated to a preset pressure through the pressure reducer 8, the expected flow is regulated through the gas venturi 7, the high-pressure pipeline distributed through the grid enters the inert gas injection array 2 and is sprayed out through the inert gas nozzles 4, the inert gas forms an inert gas coverage area near the experiment platform 1, the oxygen concentration of a firing area is diluted, and finally the fire disaster is extinguished.
The invention discloses an inerting explosion suppression method applied to a remote gas fire extinguishing explosion suppression system in an open space, which comprises the following steps of:
when the experimental platform 1 is found to leak fuel, the quick valve I6 and the quick valve II 9 are started through the control cabinet 11, the high-pressure inert gas of the high-pressure inert gas storage tank 10 flows along the high-pressure pipeline, the pressure is regulated to a preset pressure through the pressure reducer 8, the expected flow is regulated through the gas venturi 7, the high-pressure pipeline distributed through the grid enters the inert gas injection array 2 and is sprayed out through the inert gas nozzles 4, the inert gas is continuously injected, an inert gas coverage area is formed near the experimental platform 1, the oxygen concentration in the fuel leakage area is diluted, and the leaked fuel cannot be ignited.
Example 1
The high-pressure pipelines distributed in the grid are formed by welding high-pressure steel pipes, and the material is 20# steel; the inert gas is nitrogen; the number of the inert gas nozzles 4 on the single inert gas spraying array 2 is 25, and the arrangement mode is 5*5 array; five layers are arranged in the vertical direction, 5 inert gas nozzles 4 per layer, five layers are arranged in the axial direction, 5 inert gas nozzles 4 per layer. The high-pressure pipeline is provided with an interface with the high-pressure pipeline of the high-pressure inert gas storage tank 10, and is connected through a flange 5.
The inert gas injection array 2 is arranged according to the following principle: assuming that the potential ignition area or the potential leakage area defined by the experimental platform 1 has a height H from the ground and the entire potential ignition area or the potential leakage area has a length L, 2 inert gas injection arrays 2 are required to be arranged and placed on both sides of the ignition area or the potential leakage area in a left-right packing manner.
For the single inert gas jetting array 2, the total height of the single inert gas jetting array 2 in the vertical direction is 5H/3, and the vertical height between two inert gas nozzles 4 adjacent in the vertical direction is H/3. Take the right array as an example: defining the layer of inert gas nozzles 4 closest to the ground as the first layer of nozzles (r 11, r12, r13, r14, r15 in fig. 1 b) in the vertical direction, the vertical height of the first layer of nozzles from the ground is H/3, the vertical height of the second layer of nozzles (r 21, r22, r23, r24, r25 in fig. 1 b) from the ground is 2H/3, the vertical height of the third layer of nozzles (r 31, r32, r33, r34, r35 in fig. 1 b) from the ground is H, the vertical height of the fourth layer of nozzles (r 41, r42, r43, r44, r45 in fig. 1 b) from the ground is 4H/3, and the vertical height of the 5 th layer of nozzles (r 51, r52, r53, r54, r55 in fig. 1 b) from the ground is 5H/3.
For the individual inert gas ejection array 2, the total length of the individual inert gas ejection array 2 in the axial direction is L, and the distance between two inert gas nozzles 4 adjacent in the axial direction is L/4. Take the right array as an example: the layer of inert gas nozzles 4 closest to the flange 5 is defined as the axial first layer nozzles (r 11, r21, r31, r41, r51 in fig. 1 b), which are flush with the potential fire zone or the axial boundary of the potential fire zone, the axial distance from the axial second layer nozzles (r 12, r22, r32, r42, r52 in fig. 1 b) to the axial first layer nozzles being L/4, the axial distance from the axial third layer nozzles (r 13, r23, r33, r43, r 53) to the axial first layer nozzles being L/2, the axial distance from the axial fourth layer nozzles (r 14, r24, r34, r44, r54 in fig. 1 b) to the axial first layer nozzles being 3L/4, and the axial distance from the axial 5 layer nozzles (r 15, r25, r35, r45, r 55) to the axial first layer nozzles being L.
When the vertical height of the inert gas spraying array 2 needs to be adjusted, an inert gas spraying array bracket 3 made of angle steel with the pad height H is added to the bottom of the inert gas spraying array 2, the inert gas spraying array bracket 3 and the inert gas spraying array 2 are fixed in a bolt fixing mode, meanwhile, the pipelines on the two sides of the flange 5 are connected by adopting a high-pressure hose, and at the moment, the vertical distance from the first layer of nozzles in the vertical direction of the spraying array to the ground is changed into H/3+h.
When the horizontal distance from the inert gas spraying array 2 to the potential ignition area or the potential leakage area needs to be adjusted, only the inert gas spraying array 2 is required to be moved by the distance l, and meanwhile, the high-pressure hose is adopted to connect the pipelines at the two sides of the flange 5, so that the horizontal distance from the plane of the spraying array to the potential ignition area or the potential leakage area is changed into H+l.
As shown in fig. 3, in the inert gas injection array 2 of this embodiment, the horizontal plane of the plane where the third layer nozzle in the vertical direction is located is a reference plane, and the included angles between the inert gas nozzle 4 and the horizontal plane are respectively: the first layer of nozzles (l 15, r 15) 45 °, the second layer (l 25, r 25) 22.5 °, the third layer (l 35, r 35) 0 °, the fourth layer (l 45, r 45) -22.5 °, the fifth layer (l 55, r 55) -45 °, while the plane of the third layer is the same plane as the plane of the potential ignition region or the potential leakage region.
In this embodiment, the inert gas nozzle 4 is connected with the nozzle adapter 12 through a connector flange, taking the installation structure of the inert gas nozzle 4 with the injection direction of the bottom spray hole being 45 ° as shown in fig. 4 as an example, the inert gas nozzle 4 is connected with the nozzle adapter 12 through a connector flange, the connector of the nozzle adapter 12 and the high-pressure pipeline is also connected through a connector flange, and the angle of the nozzle adapter 12 is 45 °; when the injection angle needs to be adjusted, the nozzle adapter 12 is only required to be changed into the nozzle adapter 12 with other angles.
Although the embodiments of the present invention have been disclosed above, it is not limited to the use listed in the specification and embodiments, and it can be fully applied to various fields of fire fighting explosion suppression technology suitable for the present invention. Additional modifications and variations may readily be made by those skilled in the art without departing from the principles of the present invention, and the invention is not limited to the specific details and illustrations shown and described herein.
Claims (6)
1. The remote gas fire-extinguishing explosion-suppressing system is applied to an open space and is characterized by comprising a gas storage system, a gas conveying system, a gas spraying system and a starting control system;
the gas storage system comprises a high-pressure inert gas storage tank (10), wherein a pressure gauge, a safety valve and an emptying valve are arranged on the high-pressure inert gas storage tank (10);
the gas delivery system comprises a quick valve I (6), a gas venturi (7), a pressure reducer (8), a quick valve II (9) and a high-pressure pipeline;
the gas injection system comprises an inert gas injection array (2), an inert gas injection array bracket (3), inert gas nozzles (4), a flange (5) and a nozzle adapter (12);
the starting control system comprises a control cabinet (11) and an electric wire;
the high-pressure inert gas storage tank (10) is sequentially connected with the quick valve II (9), the pressure reducer (8), the gas venturi tube (7) and the quick valve I (6) through a high-pressure pipeline, and is divided into 2 paths through a tee joint, each path is connected with 1 vertical inert gas injection array (2) through a flange (5), and the inert gas injection array (2) is fixed on the inert gas injection array bracket (3); the 2 inert gas injection arrays (2) are positioned on two sides of the experiment platform (1), the length of the experiment platform (1) is L, the height of the experiment platform is H, the length of the inert gas injection arrays (2) is L, the height of the vertical symmetry center line is H, and the horizontal distance between the inert gas injection arrays (2) and the experiment platform (1) is H;
the inert gas injection array (2) consists of inert gas nozzles (4) arranged in a grid manner, and each inert gas nozzle (4) is arranged on the junction of high-pressure pipelines distributed in the grid manner through a nozzle adapter (12); the nozzle adapter (12) is provided with a preset included angle and is used for changing the injection angle of the inert gas nozzle (4);
the total height of the single inert gas injection array (2) along the vertical direction is 5H/3, and the vertical height between two adjacent inert gas nozzles (4) along the vertical direction is H/3; for the right array, defining a layer of inert gas nozzles (4) close to the ground as first layer nozzles in the vertical direction, wherein the vertical height from the first layer nozzles in the vertical direction to the ground is H/3, sequentially defining that the vertical height from the second layer nozzles in the vertical direction to the ground is 2H/3, the vertical height from the third layer nozzles in the vertical direction to the ground is H, the vertical height from the fourth layer nozzles in the vertical direction to the ground is 4H/3, and the vertical height from the 5 th layer nozzles in the vertical direction to the ground is 5H/3;
the total length of the single inert gas injection array (2) along the axial direction is L, and the distance between two adjacent inert gas nozzles (4) along the axial direction is L/4; for the right array, defining a layer of inert gas nozzles (4) close to the flange (5) as axial first-layer nozzles, wherein the axial first-layer nozzles are level with the potential ignition area or the axial boundary of the potential ignition area, the axial distance from the axial second-layer nozzles to the axial first-layer nozzles is L/4, the axial distance from the axial third-layer nozzles to the axial first-layer nozzles is L/2, the axial distance from the axial fourth-layer nozzles to the axial first-layer nozzles is 3L/4, and the axial distance from the axial 5-layer nozzles to the axial first-layer nozzles is L;
the horizontal plane of the plane where the third layer of nozzles in the vertical direction in the inert gas injection array (2) are positioned is taken as a reference plane, and the included angles of the inert gas nozzles (4) and the horizontal plane are respectively as follows: the first layer of nozzles 45 degrees, the second layer of nozzles 22.5 degrees, the third layer of nozzles 0 degrees, the fourth layer of nozzles-22.5 degrees and the fifth layer of nozzles-45 degrees, and simultaneously, the plane of the third layer of nozzles is the same as the plane of the potential ignition area or the potential leakage area;
the quick valve I (6) and the quick valve II (9) are connected to a control cabinet (11) through wires, and the control cabinet (11) controls the opening and closing of the quick valve I (6) and the quick valve II (9);
the pressure range of the high-pressure pipeline is 3-7 MPa;
the remote gas fire-extinguishing explosion-suppression system is suitable for extinguishing and suppressing fuel leakage, fire and explosion accidents in the ground test site of the aviation power plant, and is also expanded to be arranged and used in test plants and warehouses involving inflammable and explosive mediums.
2. The remote gas fire extinguishing and explosion suppression system for open spaces of claim 1, wherein the inert gas is nitrogen, carbon dioxide or halogenated alkyl fire extinguishing agent.
3. The remote gas fire-extinguishing and explosion-suppressing system applied to an open space as recited in claim 1, wherein the high-pressure pipeline is made of 20# steel.
4. The remote gas fire-extinguishing explosion-suppressing system applied to the open space as claimed in claim 1, wherein the inert gas nozzle (4) is of a bottle structure; the bottle mouth of the bottle body is provided with an interface flange which is fixedly connected with a corresponding interface flange on the nozzle adapter (12); two circles of side holes are formed in the position, close to the bottle bottom, of the bottle body, the number of each circle of side holes is 4, the two circles of side holes are uniformly distributed along the circumferential direction of the bottle body, and the two circles of side holes are distributed in a staggered mode; the inner diameter of the side hole is d, the center of the bottle bottom is provided with a bottom hole, and the inner diameter of the bottom hole is 4d; the total injection area of the single inert gas nozzle (4) is 6pi.d 2 。
5. A method for extinguishing fire in a remote gas fire suppression and explosion suppression system for open spaces according to claim 1, comprising the steps of:
when the experiment platform (1) is found to generate a fuel fire disaster, the quick valve I (6) and the quick valve II (9) are started through the control cabinet (11), high-pressure inert gas of the high-pressure inert gas storage tank (10) flows along the high-pressure pipeline, the high-pressure inert gas is regulated to a preset pressure through the pressure reducer (8), the gas venturi (7) is regulated to an expected flow, the gas enters the inert gas injection array (2) through the high-pressure pipeline distributed in a grid mode, the inert gas is sprayed out through the inert gas nozzles (4), an inert gas coverage area is formed near the experiment platform (1) by the inert gas, the oxygen concentration of a fire area is diluted, and finally the fire disaster is extinguished.
6. An inerting explosion suppression method for a remote gas fire suppression and explosion suppression system for an open space according to claim 1, comprising the following steps:
when the experimental platform (1) is found to leak fuel, the quick valve I (6) and the quick valve II (9) are started through the control cabinet (11), high-pressure inert gas of the high-pressure inert gas storage tank (10) flows along the high-pressure pipeline, the high-pressure inert gas is regulated to a preset pressure through the pressure reducer (8), the gas venturi (7) is regulated to an expected flow rate, the gas enters the inert gas injection array (2) through the high-pressure pipeline distributed in a grid mode and is sprayed out through the inert gas nozzles (4), the inert gas is continuously injected and an inert gas coverage area is formed near the experimental platform (1), and the oxygen concentration of the fuel leakage area is diluted, so that the leaked fuel cannot be ignited.
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